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dc.contributor.authorKhachatryan, V.
dc.contributor.authorSirunyan, A.M.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorBhopatkar, Vallary
dc.contributor.authorHohlmann, Marcus
dc.contributor.authorKalakhety, H.
dc.contributor.authorMareskas-palcek, D.
dc.contributor.authorRoy, Tuhin S.
dc.contributor.authorYumiceva, Francisco X.
dc.date.accessioned2017-10-17T13:39:12Z
dc.date.available2017-10-17T13:39:12Z
dc.date.issued2016-01-08
dc.identifier.citationKhachatryan, V., Sirunyan, A.M., et alen_US
dc.identifier.urihttp://hdl.handle.net/11141/1993
dc.descriptiontop-antitop quark pairs, proton-proton collisionsen_US
dc.description.abstractA search is performed for the production of heavy resonances decaying into top-antitop quark pairs in proton-proton collisions at s=8 TeV. Data used for the analyses were collected with the CMS detector and correspond to an integrated luminosity of 19.7 fb-1. The search is performed using events with three different final states, defined by the number of leptons (electrons and muons) from the tt¯←WbWb decay. The analyses are optimized for reconstruction of top quarks with high Lorentz boosts, where jet substructure techniques are used to enhance the sensitivity. Results are presented for all channels and a combination is performed. No significant excess of events relative to the expected yield from standard model processes is observed. Upper limits on the production cross section of heavy resonances decaying to tt¯ are calculated. A narrow leptophobic topcolor Z′ resonance with a mass below 2.4 TeV is excluded at 95% confidence level. Limits are also derived for a broad Z′ resonance with a 10% width relative to the resonance mass, and a Kaluza-Klein excitation of the gluon in the Randall-Sundrum model. These are the most stringent limits to date on heavy resonances decaying into top-antitop quark pairs. © 2016 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of the «http://creativecommons.org/licenses/by/3.0/» Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.en_US
dc.language.isoen_USen_US
dc.rights© 2016 American Physical Society (APS)en_US
dc.rights.urihttps://journals.aps.org/authors/transfer-of-copyright-agreementen_US
dc.titleSearch for resonant t t ¯ production in proton-proton collisions at s =8 TeV SEARCH for RESONANT t t ¯ PRODUCTION in ⋯ V. KHACHATRYAN et al.en_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevD.93.012001


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